package LECONGHAU.STRUCTURE_PROGRAMMING.EXCERCISES;

import java.util.Scanner;

public class Bai3 {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
String kg;
do{
	System.out.println("nhap vao so kg");
	Scanner sc=new Scanner(System.in);
	kg=sc.nextLine();
	if(kg.isEmpty()||Double.parseDouble(kg)<0){
		System.out.println("vui long nhap vao so kg");
	}
}while(kg.isEmpty()||Double.parseDouble(kg)<0);
double sokg=Double.parseDouble(kg);
double sopound=sokg*2.2;
System.out.println(sokg+"kg bang "+sopound+"pound");
	}

}
